JP2015154518A - Insertion type connection unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion type connection unit having a function of operating a circuit breaker even when a normally-operable wiring state is not secured in a receptacle to which the insertion type connection unit is connected.SOLUTION: An insertion type connection unit used by being connected to a receptacle circuit has plug blades which are inserted in connection with plug reception pieces at the respective poles provided to a receptacle, a power supply circuit which is electrically connected to the plug blades and acquires driving power, an earthquake sensor which is supplied with power from the power supply circuit, detects the quake of the earthquake and outputs an output signal, and an earth fault current generator which receives the output signal from the earthquake sensor and generates earth fault current for the receptacle circuit. Earth fault current is generated among plural poles in the respective plug reception pieces.

Description

  The present invention relates to a plug-in connection unit connected to an outlet provided with a plug receptacle, and more particularly, has a function of detecting a shake due to an earthquake and operating a circuit breaker on an electric circuit to which the outlet is connected. It relates to a plug-in connection unit.

  Conventionally, various plug connection units having a function of operating a circuit breaker on an electric circuit connected to an outlet by detecting a shake due to an earthquake have been disclosed.

  For example, an example disclosed in Patent Document 1 will be described with reference to FIG. The plug connection unit shown in FIG. 4 is configured as an outlet plug 2 connected to the bus bar 1 of the low-voltage power supply and an intermediate outlet plug 3 connected to the outlet plug 4. An electric leakage breaker 11 as the circuit breaker is disposed on the bus 1, and the outlet tap 2 is disposed at an appropriate location indoors via a branch breaker 12. The outlet tap 2 is provided with insertion electrode receptacles 21 and 21 and an insertion ground electrode receptacle 22, and the insertion earth electrode receptacle 22 is grounded.

  The intermediate outlet plug 3 is provided with an abnormality detector 35 for detecting a shake due to an earthquake as an abnormal situation. When the abnormality detector 35 detects the shake, an electric signal is sent to the switch unit 37 of the ground fault generating circuit. Is output. And this switch part 37 act | operates and a weak ground fault electric current is generated between the electric power feeding circuit provided with the insertion electrode receiving metal fitting, and the earthing circuit provided with the insertion earth electrode receiving metal fitting. As a result, an unbalanced current on the electric circuit generated in the electric circuit is detected by the earth leakage breaker 11 disposed in the bus 1, and the circuit breaker is activated to interrupt the entire electric circuit.

  As described above, in Patent Document 1, an intermediate outlet plug 3 including an abnormality detector 35 and the like in an arbitrary outlet tap 2 that is normally arranged in a power feeding circuit including a leakage breaker 11 that has been conventionally used. Without any special installation work, by detecting an abnormality such as an earthquake in a desired location and operating the earth leakage breaker 11 to cut off the current of the electric circuit and prevent an electric fire. To prevent.

An example disclosed in Patent Document 2 will be described with reference to FIG. The plug-in connection unit described in FIG. 5 is configured as an outlet plug 10 that is connected to an outlet tap 26 that leads to a bus 24 of a low-voltage power supply, as in Patent Document 1. The case 12 constituting the plug-in connection unit is provided with a leakage generation unit. When a shake due to an earthquake is detected, the leakage generation unit is activated to generate an unbalanced current in the indoor commercial power line. The earth leakage breaker normally installed in the house is activated to cut off the power to the house. As described above, even in Patent Document 2, when an abnormality such as an earthquake is detected without requiring any special installation work, the earth leakage breaker to which the outlet circuit is connected is activated to cut off the current of the electric circuit. To prevent electrical fires.

JP 9-327119 A JP-A-9-147728

  When an earthquake is detected, the outlet plug type plug-in connection unit that operates the circuit breaker to shut off the current by generating a leakage current on the electric circuit requires special installation work for its introduction. However, as a precondition that the plug-in connection unit can operate normally, the electrical wiring in the outlet circuit needs to be correctly wired.

  That is, there are three poles, voltage pole (L), neutral pole (N), and ground pole (E), which are connected to the outlet. The plug-in connection unit can only operate normally for the first time only if it is present.

  It is desirable that all outlets are wired correctly. However, in rare cases, the polarity may be wrongly connected during wiring work, or the terminal may be poorly connected over time, making it conductive. There was a risk of failure.

  In such a case, although the power supply is supplied to the plug-in connection unit itself, a pseudo leakage current that is the generated unbalanced current is detected by the circuit breaker on the electric circuit. There is a problem that there may be a situation in which there is no proper power supply to the plug-in connection unit and a proper operation is not performed.

  The present invention has been made in view of such a point, and the object of the present invention is to provide a circuit breaker even if a wiring state that can operate normally is not secured in an outlet to which the plug-in connection unit is connected. An object of the present invention is to provide a plug-in connection unit having a function of operating the.

  In order to solve the above problems, in the present invention, a plug connection unit used by connecting to an outlet circuit, a plug blade inserted corresponding to the plug receiver in each pole provided in the outlet, A power supply circuit that is electrically connected to the plug blade to obtain a driving power supply, a power supply circuit that receives power from the power supply circuit, detects a shake caused by an earthquake, and outputs an output signal; A ground fault current generation unit that receives an output signal from the sensor unit and generates a ground fault current in the outlet circuit, and generates a ground fault current between a plurality of poles in each of the plug receivers. A plug-in connection unit is provided.

  According to the above configuration, since the ground fault current is generated between the plurality of poles in the plug receptacle, even if the wiring polarity in the outlet is different, the ground fault current is generated between any of the poles. The circuit breaker can be activated when activated.

  The second invention further comprises a polarity confirmation unit for measuring the voltage between the electrodes in the plug receptacle and confirming the polarity, and generating a ground fault current between the electrodes where the voltage can be confirmed. It is.

  According to said structure, since the voltage between poles is measured and polarity is confirmed, it can perform reliably producing a ground fault electric current between the poles of a voltage pole and a ground pole, for example.

  According to a third aspect of the present invention, the occurrence of the ground fault current is sequentially output with a predetermined time difference.

  According to the above configuration, since the ground fault current is sequentially output between the poles with a predetermined time difference, even if the circuit breaker does not operate when output between the first poles, Since the circuit breaker is activated by outputting between the poles, the circuit breaker can be reliably operated.

  As described above, according to the present invention, it is possible to provide a plug-in connection unit that operates a circuit breaker even if a wiring state that can operate normally is not secured in an outlet to which the plug-in connection unit is connected. it can.

It is the schematic of the electrical circuit where the plug-in connection unit which concerns on Embodiment 1 of this invention is applied. It is a block block diagram of the plug-in connection unit which concerns on Embodiment 1. FIG. It is the table figure which matched the state of the voltage between each pole, and the state of wiring. It is a figure which shows the prior art example 1. FIG. It is a figure which shows the prior art example 2.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, description of the following preferable embodiment is only an illustration essentially, and does not restrict | limit this invention, its application thing, or its use.

In the electric circuit shown in the embodiment, the neutral wire side of the secondary winding of the transformer 2 interposed in the electric circuit is grounded by providing the first electrical terminal 21 on the ground, and the load side of the transformer The distribution board 1 is provided, and an electric circuit having a grounding system configured to ground an electric device or the like by a second electrical terminal 104 provided from the distribution board 1 side toward the ground.

  Also, in this application, as defined in JEAC 8001, the extension regulations of the Electricity Regulations published by the Japan Electric Association, the neutral wire is the electric wire connected to the neutral pole of the power source of the multi-wire circuit, A neutral wire or a grounded wire that is grounded according to technical needs in the electric circuit is called a grounded electric wire. For example, in a single-phase three-wire circuit, there are two voltage poles as voltage poles, that is, an L1 pole and an L2 pole, and an N pole as a neutral pole. In the single-phase two-wire circuit, there is a ground-side electric wire that is grounded to the voltage electrode. The grounding electrode is the E pole.

  In FIG. 1, 1 is a distribution board, 101 is a main circuit breaker which is a circuit breaker, and has a leakage detection function. A plurality of branch breakers 102 are connected to the load side of the main breaker 101. Reference numeral 103 denotes a centralized ground terminal for connecting a ground line connected to the ground and for connecting a ground line in the branch circuit.

  Reference numeral 105 denotes an outlet in the branch circuit. Normally, one of the L1 pole and the L2 pole, a neutral pole, and a ground pole are connected to the outlet 105.

  3 is a plug-in connection unit. In FIG. 2, the plug connection unit 3 includes a plug blade 31 connected to the voltage electrode, a plug blade 32 connected to the neutral electrode, a plug blade 33 connected to the ground electrode, and an electrical connection to these plug blades. The power supply circuit 34 that acquires the driving power supply, the seismic sensor unit 35 that is supplied with power from the power supply circuit 34 to detect a shake due to an earthquake and outputs an output signal, and the output signal from the seismic sensor unit 35 In each of the plug receivers, a signal processing unit 30 that performs signal processing in response to the signal, a ground fault current generation unit 36 that receives an output signal from the signal processing unit 30 and generates a ground fault current in the outlet circuit 105, and A polarity confirmation unit 37 that measures the voltage between the electrodes and confirms the polarity is provided. The signal from the polarity confirmation unit 37 is output to the signal processing unit 30, and the display content is displayed on the polarity display unit 39 after being processed by the signal processing unit 30.

The ground fault current generator 36 is configured to be connected / disconnected by a relay between the respective poles in the plug receiver. When the signal processing unit 30 receives an output signal from the seismic sensor unit 35, the signal processing unit 30 is sequentially connected between the respective poles in the plug receiver and outputs a ground fault current. Even if the polarity of the wiring at the outlet is incorrect, the ground fault current is output between the voltage electrode and the ground electrode while the ground fault current is output sequentially and the circuit breaker is activated.

Next, an example in which the polarity confirmation unit 37 is provided as another embodiment will be described.

The polarity confirmation part 37 measures the voltage between each pole in a plug receptacle. Then, the measurement result is output to the signal processing unit 30, and the ground fault current from the ground fault current generating unit 36 is applied to the gap between which the voltage has been confirmed.

Here, the polarity display part 39 is comprised using LED, and it is visually recognizable by displaying whether a polarity is normal or not by changing a lighting color. When the polarity is normal, blue is lit, and when the polarity is abnormal, red is lit. Further, in the vicinity of the LED, for example, “blue: normal, red: abnormal” is added so as to identify the meaning of the lighting.

  Next, wiring connected to the outlet 105 will be described. The outlet with the grounding electrode is connected to the L pole (L1, L2), N pole, and E terminal of the distribution board by a conductor according to the pole arrangement. When each pole of the outlet is normally connected to each pole conductor of the distribution board, about 100V between the L and N poles of the outlet, about 100V between the LE and E poles, no voltage between the NE poles It becomes.

  In the polarity confirmation part 37, the voltage between each above-mentioned pole is measured, and the result is determined based on a table. It should be noted that there is a voltage range in the determination for the portions described as 100V and 0V in the table, and within the range, it is determined that the voltage is 100V or 0V. For example, in the case of 100V, if it is in the range of 90-110V, it will be determined as 100V, and in the case of 0V, it will be determined as 0V in the case of 0-5V.

  If it can be determined that the connection polarity is normal based on this table, the polarity display unit 39 displays that the wiring connection is normal. On the other hand, when the connection polarity is wrong, for example, when the connection between the neutral electrode (N) and the ground electrode (E) is different, the ground fault current can be output from the ground fault current generator. Since the ground fault current flows between the voltage electrode (L) and the neutral electrode (N), the main breaker 101 does not operate, and the plug-in connection unit cannot operate correctly.

  If there is an abnormality in the wiring of the outlet, the main breaker may not operate even if the plug-in connection unit 1 operates in the first place, and the correct voltage is not supplied to the plug-in connection unit 1 itself. There is a possibility that the plug-in connection unit 1 is attached to the outlet, but such a situation can be avoided at an early stage.

  Reference numeral 38 denotes a power storage unit connected to the power supply circuit 34 and the signal processing component arrangement space 30. When power supply from an electric power company or the like is stopped after the occurrence of an earthquake, the signal processing unit stores the fact that an earthquake has occurred for a certain period of time. The power storage unit 38 is configured using a capacitor, but may be configured using other primary batteries or secondary batteries.

  Reference numeral 40 denotes a test operation circuit. The test operation circuit 40 is configured by using an operation switch, and is connected to the signal processing unit 30. When the operation switch is operated, the switch circuit is closed, and an output signal is sent from the signal processing unit 30 to the ground fault current generation unit 36 to cause the outlet circuit 105 to generate a ground fault current.

  The ground fault current is applied between the plug blade 31 connected to the voltage electrode and the plug blade 33 connected to the ground electrode. The ground fault current may be applied between the plug blade 32 connected to the neutral electrode and the plug blade 33 connected to the ground electrode.

  In this way, since the plug connection unit is configured with the polarity confirmation unit that measures the voltage between the poles in each plug receptacle and confirms the polarity, there is a wiring state in which the plug connection unit can operate normally in the first place. Even if it is not secured, it is possible to provide a plug-in connection unit that operates the circuit breaker.

1 Distribution board 101 Main breaker 102 Branch breaker 103 Centralized grounding terminal 104 Second electrical terminal 105 Outlet 2 Transformer 21 First electrical terminal 3 Plug-in connection unit 30 Signal processing unit 31 Plug blade 32 of voltage pole Plug blade 33 of ground electrode Plug blade 34 of ground electrode Power supply unit 35 Seismic sensor unit 36 Ground fault current generation unit 37 Polarity confirmation unit 38 Power storage unit 39 Polarity display unit 40 Test operation unit

Claims (3)

Plug-in connection unit that is used by connecting to an outlet circuit,
A plug blade to be inserted in correspondence with the plug receptacle at each pole provided in the outlet;
A power supply circuit that is electrically connected to the plug blade to obtain a driving power supply;
A seismic sensor unit that is supplied with power from the power supply circuit, detects shaking due to an earthquake, and outputs an output signal;
A ground fault current generating unit that receives an output signal from the seismic sensor unit and generates a ground fault current in the outlet circuit;
A plug-in connection unit that generates a ground fault current between a plurality of poles in each of the plug receptacles. 2. The plug-in according to claim 1, further comprising a polarity confirmation unit that measures a voltage between the electrodes in the plug receiver and confirms a polarity, and generates a ground fault current between the electrodes where the voltage can be confirmed. Connection unit. 2. The plug-in connection unit according to claim 1, wherein the occurrence of the ground fault current is sequentially output with a predetermined time difference.

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